JP6137104B2 - Method of joining metal member and resin member - Google Patents

Description

  The present invention relates to a method for joining a metal member and a resin member.

  Conventionally, weight reduction has been demanded in the fields of automobiles, railway vehicles, aircraft, and the like. For example, in the field of automobiles, the use of high-tensile materials has made it possible to make steel sheets thinner, aluminum alloy materials have been used as substitutes for steel materials, and resin materials have also been increasingly used. In these fields, development of joining technology for metal members and resin members is important not only for reducing the weight of the car body, but also for increasing the strength and rigidity of the joining members and improving productivity. is there. So far, a so-called friction stir welding (FSW) method has been proposed as a method for joining a metal member and a resin member. As shown in FIG. 10, the friction stir welding method is a method in which a metal member 211 and a resin member 212 are overlapped, and the rotary tool 216 is rotated and pressed against the metal member 211 to generate frictional heat. In this method, the resin member 212 is melted and then solidified to join the metal member 211 and the resin member 212 together.

  In such a friction stir welding method, for example, a technique (Patent Document 1) is disclosed in which the shape and push-in amount of the rotary tool are set within a specific range from the viewpoint of joining strength and simple joining. In addition, in the conventional friction stir welding method, there are various methods for fixing the metal member and the resin member, including a stationary joining device and a robot joining device, but at the same time as the rotary tool is separated from the metal member at the end of the joining work, Generally, the vicinity of the joint is released from the restrained state.

  On the other hand, a technique for improving the strength of a resin member by adding a reinforcing fiber to the resin member is known. For example, in the field of compression molding methods, it is a fiber reinforced thermoplastic resin composite material composed of reinforced fibers and a thermoplastic resin from the viewpoint of preventing resin deterioration, improving productivity, and increasing strength and elastic modulus. A compression molding material in which reinforcing fibers having a specific fiber length are contained in a specific volume content and the same fiber axis direction is disclosed (Patent Document 2).

JP 2010-158885 A JP 2004-142165 A

  However, in the conventional friction stir welding method, when a conventional fiber reinforced resin member is used, the bonding strength may be reduced.

  The inventors of the present invention have intensively studied the phenomenon of such a decrease in bonding strength, and as a result, have found that the phenomenon is caused by springback of reinforcing fibers contained in the resin member. Specifically, as shown in FIG. 11A, the pressing member 216 is pushed into the metal member 211, and the region 221 directly below the pressing member of the resin member 212 and its outer peripheral region are melted by frictional heat, and then solidified. As a result, springback occurred in the melted and solidified region of the resin member 212. The spring back is a phenomenon in which the curved reinforcing fiber is released from the restraining force when the resin member 212 is melted and deforms so as to return straight. When such spring back occurs, as shown in FIG. 11 (B), bubbles are mixed in the melt-solidified region of the resin member 212, and a bubble layer 222 that appears to be foamed is formed. It is considered that the bonding strength is reduced by the occurrence of intra-layer fracture in the low-bubble cell layer 222.

  An object of this invention is to provide the joining method of the metal member and resin member which can achieve joining with sufficient intensity | strength of a resin member and a metal member.

The present invention
After the metal member and the resin member containing the reinforcing fiber are overlapped, heat and pressure are locally applied by pressing from the metal member side by the first pressing member, and the resin member is softened and melted, and then the first pressing is performed. It is a joining method between a metal member and a resin member by a hot-pressure joining method in which pressing by a member is terminated and solidified,
At the latest, from the end of pressing by the first pressing member, pressing from the metal member side by the second pressing member to perform the clamping of the metal member and the resin member,
The present invention relates to a method for joining a metal member and a resin member, wherein the pressing by the second pressing member is continuously performed even after the pressing by the first pressing member is finished.

The present invention also provides
A first step of superimposing the metal member and the resin member; and while rotating the rotary tool as the first pressing member, the metal member is pressed to generate frictional heat, and the resin member is softened and melted by the frictional heat. Then, the method of joining the metal member and the resin member by the friction stir welding method including the second step of terminating the pressing by the rotating tool and solidifying and joining the metal member and the resin member,
At the latest, from the end of pressing by the rotary tool, the metal member and the resin member are pressed by pressing from the metal member side with the clamp member as the second pressing member,
The present invention relates to a method for joining a metal member and a resin member, wherein the pressing by the clamp member is continuously performed even after the pressing by the rotary tool is finished.

  According to the joining method of the present invention, even when the reinforcing fiber is contained in the resin member, the joining of the resin member and the metal member can be achieved with sufficient strength.

It is a schematic diagram which shows an example of a part of friction stir welding apparatus suitable for the joining method of the metal member and resin member concerning this invention. It is an enlarged view of the front-end | tip part of an example of the rotation tool as a 1st press member used for the joining method of this invention. It is an enlarged sketch of the rotary tool as a 1st press member in FIG. 1, and the clamp member as a 2nd press member. It is a schematic sectional drawing for demonstrating an example of the clamp start process in the 1st embodiment of the present invention. It is a schematic sectional drawing for demonstrating an example of the preheating process in the 1st embodiment of this invention. It is a schematic sectional drawing for demonstrating an example of the pushing stirring process in the 1st embodiment of this invention, and a 2nd embodiment, a stirring maintenance process, and a holding process. It is a schematic sectional drawing for demonstrating an example of the clamp continuation process in the 1st embodiment of the present invention, and the 2nd embodiment. It is a schematic sectional drawing for demonstrating an example of the preheating process in the 2nd embodiment of this invention. It is the schematic for demonstrating the measuring method of the joint strength in an Example. It is this schematic sketch for demonstrating the joining method of the metal member and resin member in a prior art. (A) is a schematic sectional drawing for demonstrating the joining method of the metal member and resin member in a prior art, (B) is the metal member and resin member in the joined_body | zygote obtained by the method of (A). It is an enlarged view of the joining boundary surface.

  In the joining method of the present invention, the metal member and the resin member are overlapped, and heat and pressure are locally applied by pressing from the metal member side or the resin member side by the first pressing member to soften and melt the resin member. After that, the pressing by the first pressing member is finished, and the metal member and the resin member are joined by solidifying and pressing. The joining method employed in the joining method of the present invention is not particularly limited as long as it is a method of locally applying heat and pressure by the first pressing member. For example, friction stir welding method, ultrasonic heating joining It may be a method or the like. Preferably, it is a method in which heat and pressure are locally applied from the metal member side by the first pressing member, and a friction stir welding method is more preferably employed.

  With the friction stir welding method, as will be described in detail later, the metal member and the resin member are overlapped, and while rotating the rotary tool as the first pressing member, the metal member is pressed to generate frictional heat, In this method, the resin member is softened and melted by the frictional heat and then solidified to join the metal member and the resin member.

  The ultrasonic heating bonding method is a resin produced by superposing a metal member and a resin member and causing ultrasonic vibrations to occur in the first pressing member and the resin member while pressing the resin member by the first pressing member. In this method, the resin member is softened and melted by the frictional heat of the member / metal member, and then solidified to join the metal member and the resin member.

  Hereinafter, although the joining method of the present invention employing the friction stir welding method will be described in detail with reference to the drawings, it is apparent that the effects of the present invention can be obtained by other methods as well. When the pressing by the first pressing member is performed from the resin member side, the pressing by the second pressing member is also generally performed from the resin member side.

[Method of joining metal member and resin member by friction stir welding method]
The joining method (friction stir welding method) of the present invention will be specifically described with reference to FIGS. FIG. 1 is a schematic view showing an example of a part of a friction stir welding apparatus suitable for a method for joining a metal member and a resin member according to the present invention. FIG. 2 is an enlarged view of the tip of an example of a rotary tool used in the joining method of the present invention. FIG. 3 is an enlarged sketch of the rotary tool and the clamp member in FIG. FIG. 4 is a schematic cross-sectional view for explaining an example of a clamping start process in the first embodiment of the present invention. FIG. 5 is a schematic cross-sectional view for explaining an example of a preheating process in the first embodiment of the present invention. FIG. 6 is a schematic cross-sectional view for explaining an example of the indentation stirring step, the stirring maintaining step, and the holding step in the first embodiment and the second embodiment of the present invention. FIG. 7 is a schematic cross-sectional view for explaining an example of the clamping continuation process in the first embodiment and the second embodiment of the present invention. FIG. 8 is a schematic cross-sectional view for explaining an example of the preheating process in the second embodiment of the present invention. In these drawings, common reference numerals indicate the same members.

(1) Joining Device First, FIG. 1 is a diagram schematically showing an example of a part of a friction stir welding device suitable for carrying out the joining method of the present invention. The friction stir welding device 1 shown in FIG. 1 is configured as a device for friction stir welding a metal member 11 and a resin member 12, and as a cylindrical rotary tool 16 as a first pressing member and a second pressing member. The cylindrical clamp member 18 is provided.

  As shown in the figure, the rotary tool 16 is applied to the workpiece 10 with the metal member 11 on the top and the resin member 12 on the bottom, by a drive source (not shown) as indicated by an arrow A1. While rotating around the central axis X (see FIG. 2), it moves downward as indicated by an arrow A2. At this time, the rotary tool 16 applies pressure in the pressing region P (scheduled pressing region) on the surface of the metal member 11. Friction heat is generated by the pressing of the rotary tool 16, and the friction heat is conducted to the resin member 12 to soften and melt the resin member 12, and then the molten resin is solidified. As a result, the metal member 11 and the resin member 12 are joined.

  FIG. 2 is an enlarged view of the distal end portion of the rotary tool 16. In FIG. 2, the right half shows the appearance of the rotary tool 16, and the left half shows a cross section. As shown in FIG. 2, the columnar rotary tool 16 has a pin portion 16 a and a shoulder portion 16 b at the distal end portion (lower end portion in FIG. 2). The shoulder portion 16 b is a portion at the tip of the rotary tool 16 including the circular tip surface of the rotary tool 16. The pin portion 16a is a cylindrical portion having a smaller diameter than the shoulder portion 16b, which protrudes outwardly (downward in FIG. 2) from the circular tip surface of the rotary tool 16 on the central axis X of the rotary tool 16. is there. The pin portion 16a is for positioning the rotating tool 16 when the rotating tool 16 that is rotating is first brought into contact with the workpiece 10 and pressed.

  The material of the rotary tool 16 and the dimensions of each part are mainly set according to the metal type of the metal member 11 pressed by the rotary tool 16. For example, when the metal member 11 is made of an aluminum alloy, the rotary tool 16 is made of tool steel (for example, SKD61), the diameter D1 of the shoulder portion 16b is 10 mm, the diameter D2 of the pin portion 16a is 2 mm, and the pin portion 16a protrudes. The length h is set to 0.5 mm. For example, when the metal member 11 is made of steel, the rotary tool 16 is made of silicon nitride, PCBN (cubic boron nitride sintered body), etc., the diameter D1 of the shoulder portion 16b is 10 mm, and the diameter D2 of the pin portion 16a. Is set to 3 mm, and the protruding length h of the pin portion 16a is set to 0.5 mm. Needless to say, these are merely examples, and the present invention is not limited thereto. For example, the diameter D1 of the shoulder portion 16b is usually 5 to 30 mm, preferably 5 to 15 mm, but is not limited thereto.

  The clamp member 18 applies pressure to a region other than the pressing region P by the rotary tool 16 on the surface of the metal member 11 to clamp the metal member 11 and the resin member 12. Crushing is to apply a compression action to the resin member 12 by applying pressure from the metal member 11 side. As a result, not only prevents the metal member 11 and the resin member 12 from being displaced, but also melted resin. Springback of the member 12 can also be prevented.

  An enlarged view of the clamp member 18 shown in FIG. 1 is shown in FIG. In FIG. 3, the clamp member 18 has a cylindrical shape in which a cylindrical body has a through hole in the axial direction, and the rotary tool 16 is disposed in the through hole. Is not limited to this. The clamp member 18 may have, for example, a cylindrical shape having a through hole in the axial direction in a columnar shape such as an elliptical columnar shape, a triangular prism shape, or a quadrangular prism shape. At this time, the shape of the through hole is not particularly limited as long as the rotary tool 16 is accommodated. The clamp member 18 preferably has a cylindrical shape, particularly a cylindrical shape, from the viewpoint of sufficiently preventing springback. The clamp member 18 may have a shape that does not have a through hole as long as the metal member 11 and the resin member 12 can be clamped. For example, the clamp member 18 may have an elliptical column shape, a triangular prism shape, a quadrangular prism shape, or the like. You may have simple column shape, such as a shape.

  When the clamp member 18 has a cylindrical shape, the size (inner diameter) S1 of the through hole is preferably in a range in which the rotary tool 16 can be disposed inside the through hole, so that a gap distance S3 described later can be secured. It is more preferable that it is a range. The size (inner diameter) S1 of the through hole is usually D1 to 3 × D1, particularly 1.05 × D1 to 3 × D1, preferably 1.05, when the diameter of the rotary tool 16 is D1 (mm). × D1 to 2 × D1. The thickness S2 is usually 0.2 × D1 to 2 × D1, preferably 0.5 × D1 to 1 × D1 mm. The gap distance S3 is preferably 10 mm or less, particularly preferably 0.1 to 10 mm, more preferably 0.1 to 0.5 mm, from the viewpoint of sufficiently preventing spring back. The axial height of the clamp member 18 and its pressing mechanism are not particularly limited as long as a predetermined pressing force can be maintained.

  The material constituting the clamp member 18 is not particularly limited as long as it can withstand the pressing of the metal member surface by the clamp member. For example, tool steel (for example, SKD61), aluminum alloy, or the like can be used.

  Below the rotary tool 16 and the clamp member 18, a flat plate-shaped receiving member having a size capable of receiving pressure by the rotary tool 16 and the clamp member 18 is disposed. In particular, when the clamp member 18 has a cylindrical shape, the receiving tool 17 arranged coaxially with the rotary tool 16 and the clamp member 18 has the same diameter as the outer diameter of the clamp member 18 or a larger diameter than the outer diameter. A cylindrical shape is preferable, but the shape is not limited to this. The receiving member 17 is moved upward with respect to the work 10 as shown by an arrow A3 by a driving source (not shown). The upper end surface of the receiver 17 abuts on the lower surface of the workpiece 10 (more specifically, the lower surface of the resin member 12) before the rotary tool 16 or the clamp member 18 starts to press the workpiece 10 first at the latest. The receiving tool 17 sandwiches the workpiece 10 between the rotating tool 16 and the workpiece 10 from below while resisting the pressing force during the pressing period of the rotating tool 16 and the clamp member 18, that is, during friction stir welding. To support. Note that the receiver 17 does not necessarily need to move in the direction of arrow A3, and a method of moving the rotary tool 16 or the clamp member 18 in the direction of arrow A2 after placing the workpiece 10 on the receiver 17 may be employed.

  The friction stir welding apparatus 1 is attached to a drive control device (not shown) composed of an articulated robot or the like. Then, the coordinate position of the rotary tool 16, the clamp member 18 and the receiver 17, the number of rotations (rpm) of the rotary tool 16, the applied pressure (N) and the pressurizing time (seconds), and the applied pressure (N) of the clamp member 18 and Pressurization time (seconds) and the like are appropriately controlled by the drive control device.

(2) Joining method The joining method of the metal member and the resin member by the friction stir welding method according to the present invention is at least the following steps:
A first step of superimposing the metal member 11 and the resin member 12; and while rotating the rotary tool 16, the metal member 11 is pressed to generate frictional heat, and the resin member 12 is softened and melted by the frictional heat. After that, the second step of ending the pressing by the rotary tool 16 and solidifying it to join the metal member 11 and the resin member 12:
Is included.

  In the present invention, from the end of the pressing by the rotary tool 16 at the latest, the clamp member 18 is pressed from the metal member side, the metal member and the resin member are pressed together, and the pressing by the clamp member 18 is performed. This is performed continuously after the pressing by the rotating tool 16 is finished.

  The end of pressing by the rotary tool 16 means that the rotary tool 16 is separated from the metal member 11.

The pressing by the clamp member 18 may be started at or before the end of the pressing by the rotary tool 16. For example, the pressing by the rotating tool 16 may be started or before the pressing by the rotating tool 16. You may start at or just before the end of.
The point in time when the rotary tool 16 starts to press means that the rotary tool 16 is in contact with the metal member 11 for the first time and pressurizes.

  Specifically, in the case of joining under the conditions having a preheating step C1, an indentation stirring step C2, an agitation maintaining step C3, or a maintaining step C4, which will be described later, the pressing start timing by the clamp member 18 is the preheating step C1, indentation described later. The start point, end point, or middle of the stirring step C2, the stirring maintaining step C3, or the maintaining step C4 may be used.

  When the pressing by the clamp member 18 is continuously performed even after the pressing by the rotary tool 16 is finished, the surface of the metal member is pressed by the clamp member 18 even after the rotary tool 16 is separated from the metal member 11. This means that pressing with the resin member is performed.

  By starting the pressing by the clamp member 18 at the end of the pressing by the rotating tool 16 at the latest and continuing after the pressing by the rotating tool 16, the spring back can be sufficiently prevented, and the bonding strength can be prevented. Will improve. Specifically, even when the curved reinforcing fiber is released from the restraining force by the resin component due to the melting of the resin component in the resin member at the time of joining, the compressing action is exerted on the resin member 12 by the pressing by the clamp member 18. Can be prevented sufficiently, that is, spring back. If the start time of pressing by the clamp member 18 is later than the end time of pressing by the rotary tool 16, a springback occurs until the start of pressing by the clamp member 18 or until the resin member 12 is solidified. It is difficult to eliminate it sufficiently. When the end time of pressing by the clamp member 18 is at or before the end time of pressing by the rotary tool 16, springback occurs.

  Hereinafter, a case where the start time of pressing by the clamp member 18 is before the start of pressing by the rotary tool 16 (when the preheating step C1 to be described later is started) will be described in detail as a first embodiment, and the pushing stirring step C2 The case where the starting time is set as the second embodiment will be described in detail. For example, when the start time of pressing by the clamp member 18 is set as the start time of pressing by the rotary tool 16, when starting or during the preheating step C1, the stirring maintaining step C3 or the maintaining step C4 described later, or described later Since the description of the case where the pushing stirring step C2 is performed is the same as that in the first embodiment except that the timing of the start of pressing by the clamp member 18 is matched to each case, the description thereof is omitted. .

<First Embodiment>
First step:
In the first step, as shown in FIG. 1, the metal member 11 and the resin member 12 are overlapped at a desired joint portion.

Second step:
In the second step, at least a push-in stirring step C2 is performed in which the rotary tool 16 is pushed into the metal member 11 to enter a depth that does not reach the joining boundary surface 13 between the metal member 11 and the resin member 12.

In the second step, it is preferable to perform the preheating step C1 in which the rotating tool 16 is rotated in a state where only the front end portion of the rotating tool 16 is in contact with the surface portion of the metal member 11 before the pushing and stirring step. It doesn't have to be done.
After the indentation stirring step, it is preferable to perform the stirring maintenance step C3 in which the rotation operation of the rotary tool 16 is continued at the position where the rotary tool 16 has entered to a depth that does not reach the joining boundary surface. It doesn't have to be.
Each step in the present invention may be performed by controlling the pressing force (pressing force) and pressing time of the rotating tool, and the amount of movement of the rotating tool in the pressing direction (contacting the bonding member after contacting the bonding member). This may be done by controlling the amount of insertion) and the movement time.

  Hereinafter, although each process is demonstrated in detail, in this embodiment, the press by the clamp member 18 is started prior to the first process (clamp start process).

(Clamp start process)
In the clamp start process, as shown in FIG. 4, the surface of the metal member 11 is pressed by the clamp member 18, and the metal member 11 and the resin member 12 are pressed.

  The pressurizing force by the clamp member 18 is set from the viewpoint of preventing spring back and avoiding excessive pressurization, and the value is usually 5 to 500 N, preferably from the viewpoint of further sufficiently preventing the spring back. 10 to 300N. This applied pressure is the total applied pressure necessary to prevent the spring back of the region where the resin member 12 is melted by a series of processes, that is, the region where the spring back of the resin member 12 can occur. It does not depend on the shape. Therefore, the pressing force per unit area of the pressing region that varies depending on the shape of the clamp member 18 is not defined. The pressing by the clamp member 18 is continuously performed even after the pressing by the rotary tool 16 is finished, that is, after the last step of the pushing stirring process C2, the stirring maintaining process C3, or the maintaining process C4 to be described later is finished. Will continue. The pressing force during pressing by the clamp member 18 is usually constant, but may vary within the above range.

  Although the clamp member 18 has a cylindrical shape in FIG. 4, the distance M between the pressing area by the rotary tool 16 and the pressing area by the clamp member 18 on the surface of the metal member 11 is whatever the shape. From the viewpoint of further sufficiently preventing the spring back, the thickness is preferably 10 mm or less, particularly preferably 0.1 to 10 mm, and more preferably 0.1 to 0.5 mm. The distance M is the shortest distance and corresponds to the gap distance S3 when the clamp member 18 has a cylindrical shape.

(Preheating process C1)
In the preheating step C1, by bringing the rotary tool 16 and the receiving member 17 close to each other, as shown in FIG. 5, only the tip of the rotary tool 16 is placed on the surface portion (upper surface portion in the illustrated example) of the metal member 11. This is a step of rotating the rotary tool 16 in a contacted state. In the preheating step C1, the rotary tool 16 is rotated at a predetermined rotation speed (for example, 3000 rpm) for a first pressurizing time (for example, 1.00 seconds) with a first pressure (for example, 900 N).

  Specifically, in the preheating step C <b> 1, frictional heat is generated at the surface portion (upper surface portion in the illustrated example) of the metal member 11 by pressing of the rotary tool 16. The frictional heat is transmitted to the inside of the metal member 11, and the range of the pressing area P (the pressing area by the rotary tool 16) of the metal member 11 and the area in the vicinity of the pressing area P are preheated. Thereby, it becomes easy to push the rotary tool 16 into the metal member 11 in the next pushing and stirring step C2.

  The first pressurizing force and the first pressurizing time in the preheating step C1 are set from the viewpoint of productivity in addition to the ease of pushing the rotary tool 16 as described above. Depending on the number of rotations, the thickness of the metal member 11, the type of material, and the like. For example, when the aluminum alloy metal member 11 having a thickness of 1 mm or more and 2 mm or less is used, the first pressing force in the preheating step C1 is preferably a value of 700 N or more and less than 1200 N. The first pressurizing time is preferably 0.5 seconds or more and less than 2.0 seconds. The number of rotations of the rotary tool is preferably 2000 rpm or more and 4000 rpm or less.

(Indentation stirring step C2)
In the pushing and stirring step C2, the rotating tool 16 and the receiving member 17 are brought close to each other, thereby pushing the rotating tool 16 into the metal member 11 as shown in FIG. When the pushing and stirring step C2 is performed after the preheating step C1, the rotating tool 16 and the receiving member 17 are brought closer to each other, thereby pushing the rotating tool 16 into the metal member 11 as shown in FIG. Thereby, the rotary tool 16 is advanced to a depth that does not reach the joint boundary surface 13 between the metal member 11 and the resin member 12. At this time, it is preferable that the lower part 110 of the metal member 11 is protruded and deformed toward the resin member 12 as shown in FIG. Thereby, about the molten resin 121 of the resin member surface melt | dissolved in the area | region directly under a rotating tool, the fusion | melting and the flow (arrow direction of FIG. 6) to the outer peripheral area | region can be accelerated | stimulated.

  Specifically, in the indentation stirring step C2, the rotary tool 16 is moved at a second pressurizing time (for example, 1500 N) that is larger than the first pressurizing time and shorter than the first pressurizing time (for example, Rotate at a predetermined rotation speed (for example, 3000 rpm) for 0.25 seconds.

  In the indentation stirring step C2, the rotating tool 16 is pushed into the metal member 11 when the applied pressure is larger than that in the preheating step C1. That is, the rotary tool 16 enters deep inside the metal member 11. Preferably, when the rotary tool 16 is pressed, the joining boundary surface 13 between the metal member 11 and the resin member 12 moves to the support 17 side (lower side in the illustrated example) in the lower portion 110 of the metal member 11. The right lower part 110 projects and deforms toward the resin member 12 side. As a result, the melting of the molten resin 121 on the surface of the resin member melted in the region immediately below the rotary tool at the joining boundary surface 13 is promoted, and flows beyond the region directly below to the outer peripheral region (see FIG. 6). Arrow direction). The molten resin spreads in a substantially circular shape centering on the region directly under the rotary tool. As a result, the contact area between the molten resin and the metal member 11 is expanded, and the melted and solidified region (bonding region) formed by solidifying the molten resin by cooling in the obtained bonded body is also expanded. Can be achieved with sufficiently good working efficiency and sufficient strength.

  If the rotary tool 16 is further pushed in (that is, if the applied pressure is too high and / or the pressurizing time is too long), the shoulder portion 16b of the rotary tool 16 exceeds the joining boundary surface. That is, the rotary tool 16 penetrates the metal member 11, and the outer peripheral portion of the rotary tool 16 contacts the resin member 12. Then, the metal member 11 is in a holed state in which the hole through which the rotary tool 16 has passed is opened, resulting in poor bonding.

  Therefore, in this indentation stirring step C2, the indentation of the rotation tool 16 is stopped when the shoulder portion 16b of the rotation tool 16 enters a depth that does not reach the joint boundary surface. In other words, the rotary tool 16 is advanced to a depth that does not reach the joint interface. As a result, in the next agitation maintaining step C3, frictional heat is generated at a reference position close to the resin member 12, a large amount of frictional heat is transmitted to the resin member 12, and softening and melting of the resin member 12 are promoted.

  The second pressing force and the second pressurizing time in the indentation stirring step C2 are set from the viewpoint of avoiding the opening of the metal member 11 as described above and the rotating tool 16 as close to the resin member 12 as possible. The value varies depending on, for example, the number of rotations of the rotary tool 16, the thickness of the metal member 11, the type of material, and the like. For example, when the aluminum alloy metal member 11 having a thickness of 1 mm or more and 2 mm or less is used, the second applied pressure in the indentation stirring step C2 is preferably a value of 1200 N or more and less than 1800 N. The second pressurization time is preferably 0.1 seconds or more and less than 0.5 seconds. The number of rotations of the rotary tool is preferably 2000 rpm or more and 4000 rpm or less.

(Stirring maintenance step C3)
In the stirring maintaining step C3, by stopping the mutual proximity of the rotary tool 16 and the receiving member 17, as shown in FIG. This is a step of continuing the rotation operation of the rotary tool 16 at the “position”). In the agitation maintaining step C3, the rotary tool 16 is moved to a third pressurization time (for example, 6.75) longer than the first pressurization time with a third pressurization force (for example, 500 N) smaller than the first pressurization force. Seconds) at a predetermined rotation speed (for example, 3000 rpm).

  In the stirring maintaining step C3, the rotating tool 16 is substantially maintained at the reference position by the applied pressure being smaller than that of the preheating step C1 (of course, being smaller than the pushing stirring step C2). Since the rotary tool 16 continues to rotate at the reference position close to the resin member 12, a large amount of frictional heat is generated, and most of the generated frictional heat moves to the resin member 12. Therefore, the resin member 12 is sufficiently softened and melted over a wide range beyond the range of the region immediately below the pressing region P.

  The third pressing force and the third pressurizing time in the stirring maintaining step C3 are set from the viewpoint of sufficient softening / melting and productivity in a wide range of the resin member 12 as described above, and the values thereof are, for example, It changes depending on the number of rotations of the rotary tool 16, the thickness of the metal member 11, the type of material, and the like. For example, when the aluminum alloy metal member 11 having a thickness of 1 mm or more and 2 mm or less is used, the third pressing force in the stirring and maintaining step C3 is preferably a value of 100 N or more and less than 700 N. The third pressurizing time is preferably a value of 1.0 second or more and less than 20 seconds, particularly a value of 3.0 seconds or more and 10 seconds or less. The number of rotations of the rotary tool is preferably 2000 rpm or more and 4000 rpm or less.

(Holding process C4)
After the agitation maintenance step C3, the rotation of the rotary tool 16 may be stopped, and a holding step C4 for holding the rotary tool 16 with a predetermined pressurizing force for a predetermined pressurization time may be performed. It is not necessary.
Similarly, as shown in FIG. 6, the holding step C <b> 4 is a step in which the rotation of the rotary tool 16 is stopped and the rotary tool 16 is held for a predetermined time with a predetermined pressure in that state. In the holding step C4, the rotary tool 16 is moved at a fourth pressure force (for example, 1000 N) that is larger than the third pressure force but smaller than the second pressure force and shorter than the third pressurization time but the second pressure force. Hold for a fourth pressurization time (for example, 5.00 seconds) longer than the pressure time.

  In the holding step C4, the rotation of the rotary tool 16 is stopped, whereby the generation of frictional heat is completed. That is, the substantial operation as the friction stir welding is finished, and cooling of the workpiece 10 is started. During the cooling period of the workpiece 10, the rotating tool 16 whose rotation has been stopped is pressed between the metal member 11 and the resin member 12 because the applied pressure is smaller than the indentation agitation step C <b> 2 but greater than the agitation maintenance step C <b> 3. It clamps by pinching between the receiving tools 17. Thereby, the adhesive force during cooling between the metal member 11 and the resin member 12 is increased, and the bonding strength after the completion of cooling and solidification is increased.

  The fourth pressurizing force and the fourth pressurizing time in the holding step C4 are set from the viewpoint of improving the adhesion strength of the pressing region P during the cooling period as described above, and the values thereof are, for example, those of the material of the metal member 11 It varies depending on the type. For example, when the aluminum alloy metal member 11 is used, the fourth pressing force in the holding step C4 is preferably a value of 700 N or more and less than 1200 N, for example. The fourth pressurization time is preferably, for example, a value of 1 second or longer.

(Clamp continuation process)
In this embodiment, at least through the clamp start step and step C2, preferably through the clamp start step and steps C1 and C2, more preferably through the clamp start step and steps C1 to C3, If necessary, after further passing through step C4 and finally extracting the rotary tool 16, as shown in FIG. 7, the pressing by the clamp member 18 is continued. Thereby, as described above, the spring back can be sufficiently prevented, and the bonding strength is improved.

  In the clamp continuation process, the pressure applied by the clamp member 18 may be within the same range from the same viewpoint as in the clamp start process.

  From the viewpoint of further sufficiently preventing the spring back, the pressing by the clamp member 18 is directly below the region pressed by the rotary tool 16 on the surface of the metal member 12 when the melting point of the resin member 12 is Tm (° C.). The interface temperature between the metal member 11 and the resin member 12 (≈the temperature in the melting region of the resin member 12) is less than Tm, preferably Tm-100 to Tm-10) ° C., more preferably Tm-100 to Tm-20 ° C. It is preferable to carry out until it becomes. In other words, it is preferable to end the pressing by the clamp member 18 after the interface temperature between the metal member 11 and the resin member 12 falls to the above temperature range. If the interface temperature between the metal member 11 and the resin member 12 at the end of pressing by the clamp member 18 is too high, springback cannot be prevented sufficiently.

  The specific clamping duration by the clamp member 18 depends on the thickness of the metal member 11 and the type of material, the thickness of the resin member 12 and the type of material, the shape of the clamp member 18, the type of material, etc. It is not possible. The clamp duration time is the time from when the rotary tool 16 is separated from the metal member 11 to when the clamp member 18 is separated from the metal member 11.

  More preferably, the surface of the metal member 12 is forcibly cooled while the pressing by the clamp member 18 is continued in this step. By this method, a decrease in the interface temperature between the metal member 11 and the resin member 12 is promoted, and the pressing time by the clamp member 18 can be shortened, that is, a series of joining processes can be shortened. Examples of the cooling method include a method of blowing an air flow in the vicinity of the pressing region 111 by the rotary tool 16.

  After performing the clamping continuation process, that is, after the clamping member 18 is separated from the metal member 11 and the pressing by the clamping member 18 is finished, the cooling is usually performed to room temperature. The cooling method is not particularly limited, and examples thereof include a standing cooling method and an air cooling method.

  As described above, the case where the metal member and the resin member are joined to each other in a dotted manner without continuously moving the rotating tool in the surface direction on the contact surface of the metal member (point joining) has been described. It is clear that the effect of the present invention can be obtained even when the metal member and the resin member are joined linearly (line joining) while continuously moving the rotary tool.

<Second Embodiment>
In this embodiment, the start time of pressing by the clamp member 18 is set as the start time of the indentation stirring step C2.

  The first step is the same as in the first embodiment.

  In the second step, at least the indentation stirring step C2 is performed. As in the first embodiment, it is preferable to perform the preheating step C1 before the indentation stirring step, but this is not always necessary. Although it is preferable to perform the stirring maintenance process C3 after the indentation stirring process, the process is not necessarily performed.

  Hereinafter, each step will be described in detail.

(Preheating process C1)
The preheating step C1 is the same as the preheating step C1 in the first embodiment except that the pressing by the clamp member 18 is not performed. Specifically, as shown in FIG. 8, without starting the pressing by the clamp member 18, only the tip of the rotary tool 16 is in contact with the surface portion (upper surface portion in the illustrated example) of the metal member 11. The rotation tool 16 is rotated.

(Indentation stirring step C2)
In the pushing agitation step C2, pressing by the clamp member 18 is started, and the rotating tool 16 and the receiving member 17 are brought close to each other, thereby pushing the rotating tool 16 into the metal member 11 as shown in FIG.

The indentation stirring process C2 of this embodiment is the same as the indentation stirring process C2 of the first embodiment, except that the pressing by the clamp member 18 is started simultaneously with the start of the process.
The pressing by the clamp member 18 in this step is the same as in the clamping start step of the first embodiment.

(Stirring maintenance step C3, holding step C4 and clamping continuation step)
The stirring maintaining process C3, the holding process C4, and the clamping continuation process in the second embodiment are the same as those in the first embodiment.

(3) Resin member The resin member 12 used in the joining method of the present invention contains a thermoplastic polymer and reinforcing fibers.

As the thermoplastic polymer constituting the resin member 12, any polymer having thermoplasticity can be used. Of these, thermoplastic polymers used in the field of automobiles are preferably used. Specific examples of such thermoplastic polymers include, for example, the following polymers and mixtures thereof:
Polyolefin resins such as polyethylene and polypropylene and acid-modified products thereof;
Polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polylactic acid (PLA);
Polyacrylate resins such as polymethyl methacrylate resin (PMMA);
Polyether resins such as polyether ether ketone (PEEK) and polyphenylene ether (PPE);
Polyacetal (POM);
Acrylonitrile-butadiene-styrene copolymer resin (ABS);
Polyphenylene sulfide (PPS);
PA6, PA66, PA11, PA12, PA6T, PA9T, MXD6 and other polyamide-based resins (PA);
Polycarbonate resin (PC);
Polyurethane resin;
A fluoropolymer resin; and a liquid crystal polymer (LCP).

  As the thermoplastic polymer constituting the resin member 12, a polyolefin resin, particularly polypropylene, which is inexpensive and excellent in mechanical properties is preferably used.

  The molecular weight of the thermoplastic polymer is not particularly limited. For example, the molecular weight may be such that the MFR (melt flow rate value) at 230 ° C. is 2 to 200 g / 10 minutes, particularly 2 to 55 g / 10 minutes. .

  In this specification, the value measured by JIS K 7210 is used for the MFR of the polymer.

  The resin member 12 has a substantially flat plate shape as an overall shape in FIG. 1 and the like, but is not limited to this. When the resin member 12 is overlapped with the metal member 11 for bonding, the resin member 12 is directly below the metal member 11. As long as the portion has a substantially flat plate shape, it may have any shape.

  The thickness t (thickness before joining treatment; see FIG. 4) of the portion immediately below the metal member 11 in the resin member 12 is usually 2 to 10 mm, particularly 2 to 5 mm, but is not limited thereto.

  The reinforcing fiber contained in the resin member 12 is a fiber contained in the polymer in order to improve strength in the field of polymer-containing composite materials, and is generally classified into continuous fibers and discontinuous fibers. In the present invention, the reinforcing fiber particularly means a discontinuous fiber. This is because discontinuous fibers are considered to be prone to spring back, and in the present invention, even when such discontinuous fibers are contained, spring back can be sufficiently prevented.

  The reinforcing fibers are contained in the resin member in a randomly oriented form, and the average fiber length is usually 50 mm or less, particularly 0.1 to 50 mm, preferably 1 to 50 mm. The average fiber diameter of the reinforcing fibers is not particularly limited, and is, for example, 2 to 20 μm, preferably 6 to 15 μm. The type of reinforcing fiber is not particularly limited, and examples thereof include carbon fiber and glass fiber.

  The content of the reinforcing fiber is usually 1% by weight or more, particularly 10 to 50% by weight, preferably 20 to 50% by weight, more preferably 30 to 50% by weight, based on the total amount of the resin member.

  As the content of the reinforcing fiber, a value based on the amount of each material used at the time of manufacturing the resin member can be used, and a value measured by the following method can also be used. First, the resin member is heated by an electric furnace or the like above the decomposition temperature of the thermoplastic polymer and below the decomposition temperature of the reinforcing fiber, thereby removing the thermoplastic polymer and taking out only the reinforcing fiber. By measuring the weight before and after heating, the content of reinforcing fibers can be calculated as a ratio to the weight before heating. Alternatively, the content can be measured by measuring the specific gravity.

  The resin member 12 may further contain additives other than reinforcing fibers, such as stabilizers, flame retardants, colorants, foaming agents, and the like.

  The resin member 12 can be manufactured by subjecting a mixture containing a thermoplastic polymer and reinforcing fibers and a desired additive to a molding method such as an injection molding method or a press molding method.

The melting point Tm of the resin member 12 varies depending on the type of the resin member 12, and is usually 130 to 350 ° C.
As the melting point Tm of the resin member 12, a value measured according to JIS 7121 is used.

(4) Metal member Although the metal member 11 has a substantially flat plate shape as an overall shape in FIG. 1 and the like, it is not limited to this, and only the portion that overlaps the resin member 12 for bonding is provided. As long as it has at least a substantially flat plate shape, it may have any shape.

  The thickness T (thickness before the bonding treatment; see FIG. 3) of the substantially flat plate-shaped portion that overlaps the resin member 12 in the metal member 11 is usually 0.5 to 4 mm, but is not limited thereto.

As the metal constituting the metal member 11, any metal having a melting point higher than that of the thermoplastic polymer constituting the resin member 12 can be used. Among these, the following metals and alloys used in the automotive field are preferably used:
aluminum;
Aluminum alloys such as 5000 series and 6000 series;
steel;
Magnesium and its alloys;
Titanium and its alloys.

[Example 1]
(Resin member)
A resin member 12 having dimensions of 100 mm in length, 30 mm in width, and 3 mm in thickness was produced by an injection molding method using polypropylene pellets containing 40% by weight of carbon fibers (PP-CF40-11; manufactured by Daicel Polymer Co., Ltd.). In the resin member, the average fiber length of the carbon fibers was 3 mm, and the average fiber diameter was 7 μm. The melting point Tm of the resin member was 170 ° C.

(Metal member)
As the metal member, a flat plate member (thickness: 1.2 mm) made of a 6000 series aluminum alloy was used.
(Rotation tool)
As the rotating tool, a tool made of tool steel having dimensions of each part in FIG. 2 of D1 = 10 mm, D2 = 2 mm, and h = 0.5 mm was used.
(Clamp member)
As a clamp member, the thing made from cylindrical tool steel as shown in FIG. 3 was used. The inner diameter S1 was 11 mm, the thickness S2 was 5 mm, and the gap distance S3 was 0.5 mm.

(Joining method)
The joined body of the metal member 11 and the resin member 12 was manufactured by the following method.
First step:
The end of the metal member 11 and the end of the resin member 12 were overlapped as shown in FIG.

Second step:
First, as shown in FIG. 4, the clamp member 18 was brought into contact with the metal member 11, pressure was applied to the surface of the metal member 11, and the metal member 11 and the resin member 12 were clamped (clamp start process: Pressure 200N). Such pressing by the clamp member 18 was continuously performed until the clamp continuation process described later was completed.

  Next, as shown in FIG. 5, the rotary tool 16 was rotated in a state where only the tip portion of the rotary tool 16 was in contact with the surface portion of the metal member 11 (preheating step C1: applied pressure 900 N, pressurization time 1.. 00 seconds, tool rotation speed 3000 rpm).

Thereafter, as shown in FIG. 6, the rotary tool 16 was pushed into the metal member 11 to a depth not reaching the joining boundary surface 13 between the metal member 11 and the resin member 12 (pushing stirring step C2: pressure 1500N, (Pressurization time 0.25 seconds, tool rotation speed 3000 rpm).
Next, as shown in FIG. 6, the rotation operation of the rotary tool 16 was continued at the position where the rotary tool 16 was advanced to a depth that did not reach the joining boundary surface 13 (stirring maintenance step C3: pressurizing force 500 N, pressurization) (Time 6.75 seconds, tool rotation speed 3000 rpm).

  Next, as shown in FIG. 7, even after the rotary tool 16 is extracted from the metal member 11 and the pushing surface 111 is obtained, the pressing on the surface of the metal member 11 by the clamp member 18 is continued (clamp continuation process: applied pressure 200 N). , Clamp duration 5 seconds). Immediately after the clamp duration time, the clamp member 18 was separated from the metal member 11. The clamp duration is the time from when the rotary tool 16 is separated from the metal member 11 to when the clamp member 18 is separated from the metal member 11.

(Joint strength)
As shown in FIG. 9, the joined body of the metal member 11 and the resin member 12 was placed in the jig 100. The jig 100 is configured such that a downward force acts on the upper end portion of the resin member 12 by pulling the jig 100 downward. By fixing the jig 100 and pulling the metal member 11 upward, a downward force acts on the upper end portion of the resin member 12, and the shear strength of the joint portion is not affected by the strength of the base material of the resin member 12. S was measured.
A: 4.00 ≦ S;
○: 3.00 ≦ S <4.00 (no problem in practical use);
X: S <3.00.

(Measurement)
The interface temperature (the rotational axis position of the rotary tool 16) between the metal member 11 and the resin member 12 immediately after the end of pressing by the clamp member 18 was measured with a K-type thermocouple.

[Examples 2-5 and Comparative Examples 1-2]
A resin member and a metal member were joined and evaluated by the same method as in Example 1 except that the process conditions were changed as described in the table.
In Comparative Examples 1 and 2, the clamp member 18 was not used.

[Comparative Example 3]
Other than having changed the process conditions as described in the table, and that the start time of pressing by the clamp member 18 is delayed by 2 seconds from the end point of pressing by the rotary tool 16 (end point of the stirring maintaining step C3) The resin member and the metal member were joined and evaluated by the same method as in Example 1.

  The joining method according to the present invention is useful for joining a metal member and a resin member in the fields of automobiles, railway vehicles, aircraft, home appliances, and the like.

1: Friction stir welding apparatus 10: Work 11: Metal member 12: Resin member 13: Joining interface between metal member and resin member 16: Rotating tool 17: Receiving tool 18: Clamp member 100: For measuring joint strength Jig 110: Immediately below the rotating tool of metal member 111: Pushing surface 121: Molten resin melted in the region immediately below the rotating tool

Claims (19)

A first step of superimposing a metal member and a resin member containing reinforcing fibers; and while rotating the rotary tool, the metal member is pressed to generate frictional heat, and the resin member is softened and melted by the frictional heat. Thereafter, the method of joining the metal member and the resin member by the friction stir welding method including the second step of ending the pressing by the rotating tool and solidifying and joining the metal member and the resin member,
At the latest, from the end of pressing by the rotary tool, press from the metal member side by the clamp member to perform the clamping of the metal member and the resin member,
The pressing by the clamp member is continuously performed even after the pressing by the rotating tool is finished,
The second step includes a pushing and stirring step of pushing the rotating tool into the metal member and entering the metal tool and the resin member to a depth that does not reach the joining boundary surface;
A method of joining a metal member and a resin member, characterized in that the pressing by the clamp member is started at or before the start of the indentation stirring step. The rotary tool has a shoulder portion including a circular tip surface of the rotary tool at the tip portion, and a cylindrical pin having a smaller diameter than the shoulder portion, which protrudes outward from the circular tip surface of the rotary tool. Part
The second step further includes a preheating step of rotating the rotating tool in a state where only the pin portion and the shoulder portion at the tip portion of the rotating tool are in contact with the surface portion of the metal member before the pushing and stirring step. The joining method of the metal member and resin member of Claim 1 provided. In the preheating step, the rotary tool is rotated by a first pressurizing time while being pressed with a first pressing force,
The said agitation process WHEREIN: The said rotating tool is rotated only for 2nd pressurization time shorter than the said 1st pressurization time, pressing the rotary tool with the 2nd pressurization force larger than the said 1st pressurization force. A method of joining a metal member and a resin member. The second step further comprises an agitation maintaining step of continuing the rotating operation of the rotating tool at a position where the rotating tool has entered to a depth that does not reach the joining boundary surface,
Wherein the agitation maintains process of claim 3 which rotates only between the rotating the tool first longer than between the first pressurization while pressing under a pressure less than the third pressure third pressurization A method of joining a metal member and a resin member.   The second step further includes a holding step of stopping the rotation of the rotary tool after the stirring maintaining step and holding the rotary tool at a predetermined pressurizing time for a predetermined pressurizing time in that state. 5. A method for joining the metal member and the resin member according to 4. A first step of superimposing a metal member and a resin member containing reinforcing fibers; and while rotating the rotary tool, the metal member is pressed to generate frictional heat, and the resin member is softened and melted by the frictional heat. Thereafter, the method of joining the metal member and the resin member by the friction stir welding method including the second step of ending the pressing by the rotating tool and solidifying and joining the metal member and the resin member,
At the latest, from the end of pressing by the rotary tool, press from the metal member side by the clamp member to perform the clamping of the metal member and the resin member,
The pressing by the clamp member is continuously performed even after the pressing by the rotating tool is finished,
The second step includes a pushing and stirring step of pushing the rotating tool into the metal member and entering the metal tool and the resin member to a depth that does not reach the joining boundary surface;
The rotary tool has a shoulder portion including a circular tip surface of the rotary tool at the tip portion, and a cylindrical pin having a smaller diameter than the shoulder portion, which protrudes outward from the circular tip surface of the rotary tool. Part
The second step further includes a preheating step of rotating the rotating tool in a state where only the pin portion and the shoulder portion at the tip portion of the rotating tool are in contact with the surface portion of the metal member before the pushing and stirring step. Has
A method for joining a metal member and a resin member, characterized in that the pressing by the clamp member is started at or before the start of the preheating step. In the preheating step, the rotary tool is rotated by a first pressurizing time while being pressed with a first pressing force,
The said indentation stirring process rotates only the 2nd pressurization time shorter than the said 1st pressurization time, pressing the said rotary tool with the 2nd pressurization force larger than the said 1st pressurization force. A method of joining a metal member and a resin member. The second step further comprises an agitation maintaining step of continuing the rotating operation of the rotating tool at a position where the rotating tool has entered to a depth that does not reach the joining boundary surface,
Wherein the agitation maintains process according to claim 7 is rotated only between said rotating said tool first longer than between the first pressurization while pressing under a pressure less than the third pressure third pressurization A method of joining a metal member and a resin member.   The second step further includes a holding step of stopping the rotation of the rotary tool after the stirring maintaining step and holding the rotary tool at a predetermined pressurizing time for a predetermined pressurizing time in that state. The joining method of the metal member of Claim 8, and a resin member. A first step of superimposing a metal member and a resin member containing reinforcing fibers; and while rotating the rotary tool, the metal member is pressed to generate frictional heat, and the resin member is softened and melted by the frictional heat. Thereafter, the method of joining the metal member and the resin member by the friction stir welding method including the second step of ending the pressing by the rotating tool and solidifying and joining the metal member and the resin member,
At the latest, from the end of pressing by the rotary tool, press from the metal member side by the clamp member to perform the clamping of the metal member and the resin member,
The pressing by the clamp member is continuously performed even after the pressing by the rotating tool is finished,
The second step includes a pushing and stirring step of pushing the rotating tool into the metal member and entering the metal tool and the resin member to a depth that does not reach the joining boundary surface;
The rotary tool has a shoulder portion including a circular tip surface of the rotary tool at the tip portion, and a cylindrical pin having a smaller diameter than the shoulder portion, which protrudes outward from the circular tip surface of the rotary tool. Part
The second step further includes a preheating step of rotating the rotating tool in a state where only the pin portion and the shoulder portion at the tip portion of the rotating tool are in contact with the surface portion of the metal member before the pushing and stirring step. Has
In the preheating step, the rotary tool is rotated by a first pressurizing time while being pressed with a first pressing force,
In the indentation stirring step, the rotating tool is rotated by a second pressurization time shorter than the first pressurization time while pressing the rotary tool with a second pressurization force larger than the first pressurization force. A method of joining a member and a resin member. The second step further comprises an agitation maintaining step of continuing the rotating operation of the rotating tool at a position where the rotating tool has entered to a depth that does not reach the joining boundary surface,
The said stirring maintenance process WHEREIN: The said rotating tool is rotated only for 3rd pressurization time longer than the said 1st pressurization time, pressing with the 3rd pressurization force smaller than the said 1st pressurization force. A method of joining a metal member and a resin member.   The second step further includes a holding step of stopping the rotation of the rotary tool after the stirring maintaining step and holding the rotary tool at a predetermined pressurizing time for a predetermined pressurizing time in that state. The joining method of the metal member of Claim 11, and a resin member.   The method for joining a metal member and a resin member according to any one of claims 11 and 12, wherein the pressing by the clamp member is started at or before the start of the stirring maintaining step.   When the melting point of the resin member is Tm (° C.), the pressing by the clamp member until the interface temperature between the metal member and the resin member immediately below the region pressed by the rotary tool on the surface of the metal member becomes less than Tm (° C.). The joining method of the metal member and resin member in any one of Claims 1-13 performed continuously.   The method for joining a metal member and a resin member according to any one of claims 1 to 14, wherein a distance M between the pressing area by the rotary tool and the pressing area by the clamp member is 10 mm or less on the surface of the metal member.   The metal member and resin member according to any one of claims 1 to 15, wherein the clamp member has a cylindrical shape having a through hole in the axial direction in a columnar shape, and a rotary tool is disposed in the through hole. Joining method.   The method for joining a metal member and a resin member according to claim 16, wherein the clamp member has a cylindrical shape.   The joining method of the metal member and resin member in any one of Claims 1-17 in which a reinforced fiber has an average fiber length of 0.1-50 mm.   The joining method of the metal member and resin member in any one of Claims 1-18 in which a resin member contains a reinforcement fiber in the ratio of 10 to 50 weight% with respect to this resin member whole quantity.

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